結果

問題 No.1324 Approximate the Matrix
ユーザー ああいいああいい
提出日時 2022-04-14 10:33:55
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 1,226 ms / 2,000 ms
コード長 2,617 bytes
コンパイル時間 261 ms
コンパイル使用メモリ 87,192 KB
実行使用メモリ 91,752 KB
最終ジャッジ日時 2023-08-25 19:51:05
合計ジャッジ時間 16,173 ms
ジャッジサーバーID
(参考情報)
judge11 / judge12
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 76 ms
71,248 KB
testcase_01 AC 73 ms
70,956 KB
testcase_02 AC 75 ms
71,100 KB
testcase_03 AC 634 ms
85,756 KB
testcase_04 AC 598 ms
85,424 KB
testcase_05 AC 617 ms
85,152 KB
testcase_06 AC 621 ms
85,428 KB
testcase_07 AC 629 ms
85,672 KB
testcase_08 AC 169 ms
79,084 KB
testcase_09 AC 194 ms
79,604 KB
testcase_10 AC 217 ms
80,012 KB
testcase_11 AC 270 ms
81,380 KB
testcase_12 AC 215 ms
80,320 KB
testcase_13 AC 174 ms
79,088 KB
testcase_14 AC 274 ms
81,760 KB
testcase_15 AC 206 ms
80,056 KB
testcase_16 AC 155 ms
78,336 KB
testcase_17 AC 288 ms
81,592 KB
testcase_18 AC 193 ms
79,552 KB
testcase_19 AC 211 ms
79,732 KB
testcase_20 AC 157 ms
78,760 KB
testcase_21 AC 165 ms
78,568 KB
testcase_22 AC 93 ms
76,512 KB
testcase_23 AC 279 ms
81,056 KB
testcase_24 AC 329 ms
81,804 KB
testcase_25 AC 294 ms
81,784 KB
testcase_26 AC 258 ms
80,456 KB
testcase_27 AC 226 ms
80,632 KB
testcase_28 AC 75 ms
71,308 KB
testcase_29 AC 85 ms
75,888 KB
testcase_30 AC 84 ms
75,664 KB
testcase_31 AC 94 ms
76,096 KB
testcase_32 AC 76 ms
71,360 KB
testcase_33 AC 74 ms
71,348 KB
testcase_34 AC 76 ms
71,368 KB
testcase_35 AC 80 ms
75,276 KB
testcase_36 AC 75 ms
71,332 KB
testcase_37 AC 1,019 ms
90,756 KB
testcase_38 AC 1,067 ms
91,752 KB
testcase_39 AC 1,226 ms
91,204 KB
testcase_40 AC 990 ms
90,728 KB
testcase_41 AC 1,008 ms
91,128 KB
testcase_42 AC 90 ms
76,296 KB
testcase_43 AC 90 ms
76,528 KB
testcase_44 AC 90 ms
76,384 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#その2 最初はコストが全部正の場合に使えるダイクストラ
from heapq import heappush,heappop
class MinCostFlow:
    inf = 10 **10

    def __init__(self,N):
        self.N = N
        self.G = [[] for _ in range(N)]
        self.H = [0] * N
        self.edge = []

    def add_edge(self,fr,to,cap,cost):
        e = [to,cap,cost,None]
        r = e[3] = [fr,0,-cost,e]
        self.G[fr].append(e)
        self.G[to].append(r)
        self.edge.append(e)
    def get_edge(self,i):
        return self.edge[i]

    def flow(self,s,t,f):
        N = self.N
        G = self.G
        inf = MinCostFlow.inf

        res = 0
        H = self.H  #ポテンシャル、コストが最初は正なので、最初は0でいい
        prev_v = [0] * N
        prev_e = [None] * N

        d0 = [inf] * N
        dist = [inf] * N
        while f:
            dist[:] = d0
            dist[s] = 0
            q = [(0,s)]
            while q:
                c,v = heappop(q)
                if dist[v] < c:continue
                r0 = dist[v] + H[v]
                for e in G[v]:
                    w,cap,cost,_ = e
                    if cap > 0 and r0 + cost - H[w] < dist[w]:
                        dist[w] = r = r0 + cost - H[w]
                        prev_v[w] = v
                        prev_e[w] = e
                        heappush(q,(r,w))
            if dist[t] == inf:
                return None
            """
            for i in range(N):
                H[i] += dist[i]
            """
            H = [h + d for h,d in zip(H,dist)]
            d = f
            v = t
            while v != s:
                d = min(d,prev_e[v][1])
                v = prev_v[v]
            f -= d
            res += d * H[t]
            v = t
            while v != s:
                e = prev_e[v]
                e[1] -= d
                e[3][1] += d
                v = prev_v[v]
        return res
import sys
rr = sys.stdin
N,K = map(int,rr.readline().split())
A = list(map(int,rr.readline().split()))
B = list(map(int,rr.readline().split()))
P = [list(map(int,rr.readline().split())) for _ in range(N)]

mincost = MinCostFlow(N + N + 2)
s = N + N
t = N + N + 1
inf = 400
for i in range(N):
    for j in range(N):
        v = N + j
        for k in range(1,min(A[i],B[j])+1):
            mincost.add_edge(i,v,1,inf + (2 * (k - 1) + 1 - 2 * P[i][j]))
for i in range(N):
    mincost.add_edge(s,i,A[i],0)
for j in range(N):
    mincost.add_edge(j + N,t,B[j],0)
ans = 0
for i in range(N):
    for j in range(N):
        ans += P[i][j] ** 2
ans += mincost.flow(s,t,K) - inf * K
print(ans)
0